Siphon pump



Patented Apr. 17, 1928.

enonen v. oavazaor QUINCY, MASSACHUSETTS.

SIPHON PUMP.

iApplication filed March 2, 1927. Serial No. 171,984..

The present invention relates to pumps, and more particularly to pumpswhich are used to draw liquidinto the long legs of siphons. 1 l c Theprincipal object of the present inven tion is. to provide thehollowcylinder, which is generally used in pumps of this type, withacoinbined piston and valve wherebyfliquid may be drawn into thecylinder from the source of supply and held therein in readiness foruse. I i

To the accomplishment of this object, a feature of theinventioncontemplates the provision, in a pump adapted to be connectedto the long leg of a siphon provided with a cylinder having an inlet, anoutlet, and a valve seat adjacent the outlet, of a piston rod, and apiston secured thereto movable from a position a'd'acent the inlet toaposition adjacent the outlet to vfill the cylinder with liquid from thesource of supply and also movable into engagement with the valve seat toprevent the flow of liquid through the outlet.

Broadly considered the piston may be constructed of anysuitablematerial. Theuse of a leather piston is disadvantageous,however, because it is not flexible enough to accommodate itself torestrictions in the hollow cylinder due to dents caused by theaccidental dropping of the cylinder and because it shrinks in size as itdries through disuse. I V 7 Accordingly, another object of the presentinvention is to provide the hollow cylinder with a piston which will beflexible enough to accommodate itself to restrictions in the cylindercaused by dents and which will not shrink in size through disuse.

To the accomplishment of this object, another feature of the presentinvention contemplates the provision, in a pump adapted to be connectedto the long leg of a siphon provided with a hollow cylinder having aninlet, an outlet, and a piston rod, of a spongerubber piston securedthereto and movable within the hollow cylinder from a position adjacentthe inlet to a position adjacent the outlet to fill the. cylinder with ithe source of supply. I

In the broader aspects of the invention the sponge-rubber piston may beused merely to draw liquid into the cylinder, but it is preferred toalso utilize the sponge-rubber piston as a valve in accordance with theprincipal object of the present invention.

liquid from I long leg One of the many uses of a siphon is to fill alarge number; of bottles from asingle sourceof 'supply., To revent wasteas the discharge end .ofthe siphon isvtransferred from a filled bottleto a bottle to befilled it is highly desirable that the siphon dischargeliquid onlywhen the dischargeend of the siphon is positioned inthefbottle. f Accordingly, another feature of the .present inventioncontemplates the provision, in

a pump adapted to be connected to a long leg of a siphon provided with acylinder having an inlet, an outlet, a valve seat adjacent the outlet, apiston rod, a-pist on secured thereto movable from a position. ad-

jacent. the inlet to apositionadjacent the outlet to fill the. cylinderwithliquid from .the source of.supply, and a valve engaged with thevalve seat to prevent the flow'of liquid through the outlet, of meansengaged by the mouth of the bottle for unseating the valve from thevalve seat to permit liquid to flow from the cylinder through theoutlet. Broadly considered thepiston which draws the liquidinto thecylinder and the valve which engages the valve seat to prevent the flowof liquid from the cylinder may be separate parts, but in accordancewith the principal object of the invention the piston and thevalvepreferably are combined.

Other features of the invention relate to certain devices, combinationsand arrangements of parts hereinafter described and then set forthbroadly in detail in theappended claims which possess advantages readilyapparent to those skilled in the art.

The various features of the present inven-v tion will be readilyunderstood from an inspection of the accompanying drawings showing thebest form of the invention at present known to the inventor, in which,

Figure 1 is an elevation of the pump adapted to be connected to thelongleg of a siphon, I

Fig. 2 is a sectional elevation showing how the combined piston andvalve is unseated from the valveseat through engagement with the mouthof a bottle to be filled, Fig. 3 is a detail in sectional elevationshowing the piston engaged with the valve seat, and

Fig. t is an elevation showing the pump connected to the long leg of asiphon.

Referring to the drawings the pump 5 (Fig. i) is adapted to be connectedto the 6 of, a siphon, the short leg v screen 11 in order'to filter theliquid flowin into the cylinder.

The other end ofthe cylinder 9 is enlarged by means of a flange 12 andthis flange is screw threadedto receive the threads on an outletcap 18.The outlet cap 13 is shaped to form an enlarged chamber 1 1 having anfit) annular valve seat'l5 therein;

Secured to the outlet cap 13 is a depending tube 16 through which ahollow piston rod 17 isniounted to 'slide'f'reely. The hollow piston rod17, near its upper end, is provided with a shoulder 18 which carries acylindrical block of sponge-rubber 19 interposed between two metalwashers 20 and 21, smaller indiameter' than the sponge-rubber. The'blockand washers are held in place on the shoulder '18 by a headed screw 22which fits into the upper end of the hollow rod 17. The sore W22closesxthe upper end of the'hollow rod'17 so in order to. permitliquidto flow into the hollow rod 17 it is provided with tour openings23 (Figs; 2 and The piston 19 is movable tromthe dotted line position'of Fig. 2, adjacent the inlet to the cylinder, to aposition where thepiston engagesthe valve 'seat 15 in the chamber 14 ig, 3). During thismovement the piston creates a condition of unbalanced pressure betweenthe interior of the cylinder and the surface of the liquid in the sourceof supply thus causing liquid to flow through the siphon and fillthe'cylinder. The liquid is preventedfroin flowing out of the cylinder 9by the pist'on'19 which acts as a valveengagedwith the valve seat 15.

In order to unseat the piston 19 from the valveseat" 15 and'thus permitliquid to flow from the chamber 14 through the apertures 23 into thehollow rod 17 from which the liquid may bedischarged into a bottle shownin construction lines in'Fig. 2, the tube 16 carries a sliding sleeve24; provided with a series of integralinturned prongs 25 which extendthrough elongated openings 26 in the tube '16 and engage tlieextei'iorof the hollow rod 17. The hollow rod 17 is provided withanarinulargroove 27 into which the prongs 25 spring when the piston 19enthe valve seat 15. The sleeve '24 is provided with a bell-shaped.portion 28 constructed to engage the mouth of'the bottle to be filledand hold the pump upright thereon. The bell-shaped portion '28 isprovided with a series of air-holes 29 and a series of nodes 30 toinsure the free exit of air from the bottle during the fillingoperation.

WVhen the piston 19 has been drawn from the dotted line position of Fig.2 into the position of Fig. 3 the cylinder is filled with liquid fromthe source of supply, but this liquid is prevented from flowing throughthe apertures 23 into the hollow 17 by the piston which acts as a valveen gaged with the valve seat. When thes l'eeve 24 engages the mouth or"the bottle, into which the hollow rod 17 extends, theweight of the partscauses'the' sleeve 24:- to'move' relatively to the tube 16 from theposition of Fig. 3 to the position of Fig. 2 thereby unseatin'g thepiston 19 from the valve seat 15 to permit the liquid to flow from thechamber 14 through the apertures '23 into the hollow rod 16 -fromwhich'the'liq'uid is discharged into the bottle. When the bottle isfilled the pump is removed from; the mouth of the bottle. Immediatelythe sleeve 2 1,

piston rod 17 and piston 19 drop into the position of Fig. 3 thusshutting oii further discharge of liquid until thepump'is againpositioned on another bottle wlien the valve is reopened.

In order to prevent foaming in thetbettle during the filling operationthe open end of the hollow rod 17 is provided with a discharge tip 31having two slots 32 which discharge the liquid laterally of the hollowrod.

When it is' desired to produce a continuous fiow'of liquid from thecylinder?) the piston 19 is elevated slightly from its's'e'at on thevalve seat 15 and the sleeve 24 is positioned so that theprongs'there'on instead of engaging the annular groove 27' grip theexterior of the hollow rod 17 below the annulargroove 27 This'actioncauses the material of the sleeve 21 forming the bases of the prongs 25to exert a frictional grip 011 the tube 16 thus holdingt'he tube andsleeve from relative"inoveinei'it. \Vh'en using the pump in the mannerdescribed to produce a continuous flow the tip 31 may be removed toobtain 'an unrestricted flow from the open end of the hollow rod'17.

It will be readily understood by those,

skilled in the art that even though the cylinder is dented-by accidentsthespoi'ige-rubber, being elastic, will yield enough to permit it topass the restriction without 'sticln ing, and that the portion of thesponge-rubber projecting beyond the periphery of the washer 20 willcooperate with the valve'seat 15 to shut-0H the discharge of liquid fromthe cylinder in a reliable-and certain manner.

It will be clear also to those'ski lled in this class ot'devices andwith the general objects of the present invention in view, that changespiston rod may be made in the details of structure, the described andillustrated embodiment thereof being intended as an exploitation of itsunderlying essentials, the features whereof are definitely stated intheir true scope in the claims herewith. Y

lVhat is claimed as new, is:

1. In a pump adapted to be connected to the long leg of a siphon, thecombination with a cylinder having an inlet, an outlet, and a valveseat'adjacent the outlet, a'piston rod, a piston rigidlysecured to therod movable from a position adjacent the inlet to a position adjacentthe outlet to fill the cylinder with liquid from the source of supply,and a valve engaged with the valve seat to prevent the flow of theliquid through the outlet,of means engaged by the mouthof the bottle forunseating the valve from the valve seat to permit liquid to fiow throughthe outlet. I I

2. In a pump adapted to be connected to the long leg of a siphon, thecombination with a cylinder, having an, inlet, an outlet, and a valveseat adjacent the outlet, a hollow piston rod extending through theoutlet for conducting liquid from the cylinder into the bottle to befilled and a piston secured to the rod movable from a position adjacentthe inlet to a position adjacent the outlet into engagement with thevalve seat to fill the cylinder with liquid from the source of supplyand prevent the flow of liquid through the hollow rod, of means engagedby the mouth of the bottle for unseating the piston from the valve seatto permit liquid to flow through the hollow piston rod.

3. In a pump adaptedto be connected to the long leg of a siphon, thecombination with a cylinder, having inlet and outlet caps, a valve seaton the outlet cap, and a hollow rod constructed to conduct liquid fromthe cylinder through the outlet cap into a bottle, of a piston securedto the rod and movable from a position. adjacent the inlet cap to aposition where it seats on the valve seat to fill the cylinder withliquid from the source of supply and prevent the flow of liquid throughthe hollow rod, and means movable relatively to the outlet cap forunseating the piston to permit liquid to flow through the hollow rod.

4c. A pump adapted to be connected to the long leg of a siphon having,in combination, a cylinder having an inlet, an outlet and a valve seatadjacent the outlet; a piston rod; a piston secured thereto movable froma position adjacent the inlet to a position where its seats on the valveseat to fill the cylinder from the source of supply and prevent the flowof liquid through the outlet; said piston rod being constructed toextend within a bottle and conduct the fluid from the cylinder to thebottle when the piston is unseated from the valve seat, and a sleeve,

connected to the piston rod, constructed to engage the mouth of thebottle and support the pump upright thereon movable relatively to thecylinder whereby the piston is un seated from and is seated on the valveseat automatically by the engagement and disengagement ofthe sleeve withthe mouth of the bottle.

5; In a pump adapted to be connected to the long leg of a siphon, thecombination with a cylinder having an inlet, an outlet, a valve seatadjacent the outlet, and a depending apertured tube, of a hollowapertured piston rod freely movable in said tube for conducting liquidfrom the cylinder into the bottle to be filled, a piston secured to therod movable from a position adjacent the inlet to a position adjacentthe outlet into engagement with the valve seat to fill the cylinder fromthe source of supply and prevent the -flow of liquid from the cylinderinto the apertures of the hollow rod, a sleeve 'mounted to slide on thetube having intu'rned prongs extending through the apertures of thetube, and an annular groove on the exterior surface of the piston rodarranged to receive the prongs when the piston is seated on the valveseat, said prongs being also adapted to grip the exterior surface of therod below the. annular 'groove to hold the piston permanently unseatedfrom the valve seat.

, 6. In a pump adapted to be connected to the long leg of a siphon, thecombinationv of a cylinder having an inlet, an outlet, and a valve seat,of a piston rod, and a piston secured thereto movable from a positionadjacent the inlet to a position adjacent the outlet into engagementwith the valve seat a to. fill the cylinder with liquid from the sourceof supply and prevent the flow of liquid from the cylinder, and meansfor lifting the piston off the valve seat to permit the flow of liquidfrom the cylinder.

7. In a pump adapted to be connected to the long leg of a siphon, thecombination with a cylinder having an inlet, an outlet, and an enlargedchamber adjacent the outlet, a valve seat in the chamber, of a hollowpistonrod closed at one end and open at its other end and havingapertures nearer its closed end than its open end and a piston securedto the rod between said apertures and the closed end of the rod movablefrom a position adjacentthe inlet into engagement with the valve seat tofill the cylinder with liquid from the source of supply and prevent theflow of liquid from the chamber into the apertures of the hollow rod.

8. In a pump adapted to be connected to the long leg of a siphon, thecombination of a cylinder screw threaded at both ends, an inlet capthreaded on one end of the cylinder, an outlet cap having a chambertherein threaded on the other end of thecylinder, a depending aperturedtube secured to the outlet cap, a Valve seat in the chamber, a hollowpiston rod, having an annular groove, slidably mounted in the tube, apiston secured to the rod movable from a position adjacent the inlet capinto engagement with the valve seat to fill the cylinder with liquidfrom the source of supply and pre vent the flow of liquid from thecylinder into the hollow rod, and a sleeve movably mounted on the tubehaving yielding means extending through the apertures in the tubearranged to spring into the annular groove on the, rod when the pistonengages the valve seat. n

9. In a pump adapted to be connected to the long leg of a siphon thecombination with a cylinder having an inlet, an outlet and a valve seatinterposed between the inlet and the outlet, a piston rod, and a pistonon the rod movable in contact-with the cylinder in one direction to fillthe cylinder from the sourceof supply and also movable at the limit ofitsmovement in said direction into engagement with the valve seat toprevent the flow of liquid'through the outlet, of means engaged by thebottle for unseating the piston from the valve seat to permit liquid toflow through'the outlet.

10. In a pump adapted tobe connected to the long leg of a siphon, thecombination with a cylinder'having an inlet, an outlet, and a valve seatinterposed between the inlet and the outlet, apiston'rod, and acylindrical piston having its peripheral surface movable in contact withthe cylinder to fill the cylinder with liquid'from the source of supply,and having one of its end faces movable into engagement with the valveseat to prevent the flow of liquid through the outlet, of means engagedby the bottle for unseating the piston from the valve seat topermit-liquid to flow through the outlet.

In testimony whereof I have signed my name to this specification.

GEORGE V. GAVAZA.

